Java File Size Readable Format formatSize(long size)

Description

format Size

License

Open Source License

Declaration

public static String formatSize(long size) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

public class Main {
    public static final long ONE_KILOBYTE = 1000;
    public static final long ONE_MEGABYTE = 1000 * ONE_KILOBYTE;
    public static final long ONE_GIGABYTE = 1000 * ONE_MEGABYTE;

    public static String formatSize(long size) {
        if (size >= 100 * ONE_GIGABYTE)
            return String.format("%,d GB", size / ONE_GIGABYTE);
        if (size >= 10 * ONE_GIGABYTE)
            return String.format("%.1f GB", (double) size / ONE_GIGABYTE);
        if (size >= ONE_GIGABYTE)
            return String.format("%.2f GB", (double) size / ONE_GIGABYTE);
        if (size >= 10 * ONE_MEGABYTE)
            return String.format("%,d MB", size / ONE_MEGABYTE);
        if (size >= ONE_MEGABYTE)
            return String.format("%.1f MB", (double) size / ONE_MEGABYTE);
        if (size >= ONE_KILOBYTE)
            return String.format("%,d KB", size / ONE_KILOBYTE);

        return String.format("%,d bytes", size);
    }//w  w  w .  ja v  a  2 s.  c om
}

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